<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        .w{
            width: 400px;
            height: 400px;
            margin: 50px auto 0;
            border: 1px solid #000;
            border-radius: 15px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .first{
            width: 400px;
            height: 100px;
            display: flex;
            justify-content: space-between;
        }
        .second{
            width: 400px;
            height: 100px;
            display: flex;
            justify-content: space-between;
        }
        .one{
            width: 100px;
            height: 100px;
            background-color: #000;
            border-radius: 50%;
        }
        .two{
            width: 100px;
            height: 100px;
            background-color: #000;
            border-radius: 50%;
        }
        .three{
            width: 100px;
            height: 100px;
            background-color: #000;
            border-radius: 50%;
        }
        .four{
            width: 100px;
            height: 100px;
            background-color: #000;
            border-radius: 50%;
        }
    </style>
</head>
<body>
    <div class="w">
        <div class="first">
            <div class="one"></div>
            <div class="two"></div>
        </div>
        <div class="second">
            <div class="three"></div>
            <div class="four"></div>
        </div>
    </div>
</body>
</html>